I just received the v1.1 shield yesterday. It appears that channel Y simply doesn't work, but I'm very much a newbee so if you folks can suggest a diagnostic or fix, or need more data I'd appreciate it. Thanks in advance!

Ron

I also have an Arduino Motor Shield R3 on which all motors run fine... just one at a time.____________________________________________________________________________________

The ProblemThe X channel works but the Y channel (executing the same code) has the stepper sitting there and vibrating.

B. Five different stepper motors (The two above and three different Japan Servo Company) all Unipolar with wired as Bipolar . All work on X channel but all on Y channel sit and vibrate.

C. Changed durations of both direction variables

D. Commented out both X and Y channels. Even with Y channel commented out the 3967 on the Y side gets very hot... thought that was odd. Heat-sunk both after that.

E. Changed step jumpers to 1/2, 1/4, and 1/8 step settings. Only the 1/8-step setting works with these motors.

F. The following code (from robotics.org) also runs fine on X but not on Y. Variable-step size in this sketch was implemented via the code rather than jumper settings. I made a few mods to allow all three micro-step routines to run on these Soyo motors._____________________________________________________________________________

A vibrating stepper motor indicate that it is either under too much torque (which you can verify by driving it with another channel) of that it is not wired correctly and thus the steps do not make it move CW or CCW but rather side to side.

Since you connected several motors to the y channel it is unlikely that you did the same mistake several times. So it s possible that the library is nor driving the motor pins in the right sequence. If changing the code and the motor connection does not help, please send us a ticket to our support centre so we can help you exchange the item (don't forget to include your order number)

Neither sketch calls a library, all five steppers run correctly on the X channel (and with another non-ITEAD controller shield) and I have all motors wired correctly. So by your measures the shield is faulty and I'll get the return process started unless there are more suggestions on techniques I haven't tried yet.